Based on explaining the concept of typical accident case,this paper points out that the typicality, timeliness,objectivity and integrity of the accident cases and vitality of the explanation and analysis must be grasped in the accident case analysis in order to do well the education and training work.

By introducing several typical examples in earthquake isolation of building structures in Japan,the trends in Earthquake Isolation techniques of building Structures are summarized,and meanwhile,its prospects in china and several problems needed to be solved are indicated.

Based upon the teaching practice,this paper holds that important typical examples play important roles in the teaching practice of Calculus.

On the basis of an extensive collection and analysis of the related data and survey of the survival architectures,the authors deeply research its typical examples,then analyze its characteristics of space,form,material,equipment and decoration,finally summarize the value of Xi\'an modern times mansion architectures in both historical and architectural aspect.